Streams coded with ATRAC3plus are usually stored either in the WAV container (those files have the ".at3" extension though) or in the Sony's proprietary Oma/Omg container. Common use of that codec is in nowel Minidisc players and Portable Playstations made by Sony. As in the case of its predecessor ATRAC3, ATRAC3plus represents the next generation of the ATRAC codec introduced in 1992 with the MiniDisc. 2.5.1.2 Huffman tables for delta codingĪTRAC3plus is a proprietary audio compression algorithm developed by Sony.2.4.2.2.2 Reconstruction of trimmed word-length coefficients. 2.2.1.4 Value grouping with "group coded" flag.2.2.1.3 Vector quantization with residual encoding.2.2.1.2.4 Method D: sequence of numbers in ascending order.2.2.1.2.3 Method C: shorter delta to min. 2.2.1.2.2 Method B: huffman-coded modulo difference to master.2.2.1.2.1 Method A: huffman-coded modulo difference to previous.2.2.1 Coding methods for compressing bitstream parameters.
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